rxvt-unicode/src/rxvtimg.h

/*----------------------------------------------------------------------*
 * File:        rxvtimg.h
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 2012      Marc Lehmann <schmorp@schmorp.de>
 * Copyright (c) 2012      Emanuele Giaquinta <e.giaquinta@glauco.it>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *---------------------------------------------------------------------*/

#ifndef IMG_H
#define IMG_H

#if HAVE_IMG

#define float_to_component(d) (int32_t)((d) * 65535.99)

#include <X11/extensions/Xrender.h>

struct rxvt_img
{
  typedef double nv;

  // *could* also hold the Pixmap itself
  struct pixref
  {
    int cnt;
    int w, h;
    bool ours; // false if we don't own the pixmap at all

    pixref (int w, int h)
    : cnt(1), w(w), h(h), ours(true)
    {
    }
  };

  rxvt_display *d;
  Pixmap pm;
  pixref *ref; // shared refcnt
  int x, y, w, h, repeat;
  XRenderPictFormat *format;

  rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height, int repeat = RepeatNormal);
  rxvt_img (rxvt_display *display, XRenderPictFormat *format, int x, int y, int width, int height, int repeat = RepeatNormal);
  rxvt_img (const rxvt_img &img);
  void alloc ();

# if HAVE_PIXBUF
  static rxvt_img *new_from_pixbuf (rxvt_screen *s, GdkPixbuf *pb); // from pixbuf
  static rxvt_img *new_from_file (rxvt_screen *s, const char *filename); // via pixbuf
# endif
  static rxvt_img *new_from_root (rxvt_screen *s); // get root pixmap

  ~rxvt_img ();

  Pixmap steal ()
  {
    ref->ours = false;
    return pm;
  }

  // inplace
  void move (int dx, int dy)
  {
    x += dx;
    y += dy;
  }

  void repeat_mode (int repeat)
  {
    this->repeat = repeat;
  }

  void unshare (); // prepare for write
  void fill (const rgba &c);
  void fill (const rgba &c, int x, int y, int w, int h);
  void add_alpha ();
  //void linear_gradient  (const XLinearGradient  *gradient, const XFixed *stops, const XRenderColor *colors, int nstops);
  //void radial_gradient  (const XRadialGradient  *gradient, const XFixed *stops, const XRenderColor *colors, int nstops);
  //void conical_gradient (const XConicalGradient *gradient, const XFixed *stops, const XRenderColor *colors, int nstops);

  void brightness (int32_t r, int32_t g, int32_t b, int32_t a);
  void contrast (int32_t r, int32_t g, int32_t b, int32_t a);

  void brightness (nv r, nv g, nv b, nv a = 1.)
  {
    brightness (float_to_component (r),
                float_to_component (g),
                float_to_component (b),
                float_to_component (a));
  }

  void contrast (nv r, nv g, nv b, nv a = 1.)
  {
    contrast (float_to_component (r),
              float_to_component (g),
              float_to_component (b),
              float_to_component (a));
  }

  void draw (rxvt_img *img, int op = PictOpOver, nv mask = 1.);
#if 0
  void draw (rxvt_img *img, int op = PictOpOver, nv mask = 1.,
             nv px, nv py, nv qx, nv qy, nv rx, nv ry, nv sx, nv sy);
#endif

  // copy
  rxvt_img *reify (); // make x, y 0, make real width/height
  rxvt_img *blur (int rh, int rv);
  rxvt_img *clone ();
  rxvt_img *sub_rect (int x, int y, int width, int height);
  rxvt_img *transform (const nv matrix[3][3]);
  rxvt_img *scale (int new_width, int new_height);
  rxvt_img *rotate (int cx, int cy, nv phi);
  rxvt_img *convert_format (XRenderPictFormat *format, const rgba &bg);
  rxvt_img *tint (const rgba &c);
  rxvt_img *shade (nv factor, rgba c = rgba (rgba::MAX_CC, rgba::MAX_CC, rgba::MAX_CC));
  rxvt_img *filter (const char *name, int nparams = 0, nv *params = 0);
  rxvt_img *muladd (nv mul, nv add); // general multiply and add, implemented as the biggest hack ever :/

  // egregious helper category
  rxvt_img *replace (rxvt_img *&p)
  {
    delete p;
    p = this;
    return this;
  }

  /* these are considered private */
  void destroy ();
  rxvt_img *new_empty ();
  Picture picture ();
  rxvt_img *transform (const nv *matrix);
};

#endif

#endif

Revision:	1.51
Committed:	Sat Jul 15 08:16:31 2017 UTC (6 years, 10 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rxvt-unicode-rel-9_29, rxvt-unicode-rel-9_26, rxvt-unicode-rel-9_25, rxvt-unicode-rel-9_30, HEAD
Changes since 1.50:	+2 -1 lines
Log Message:	Fix urxvtd crash when using a background expression. A rxvt_img object contains a pointer to the associated rxvt_screen, which in practice corresponds to the terminal object that created the image. This causes a use-after-free when there are two or more terminal objects sharing a rxvt_img and the one that created it is destroyed. This patch fixes the issue by replacing the rxvt_screen pointer with a pointer to the associated rxvt_display.
#	Content
1	/----------------------------------------------------------------------
2	* File: rxvtimg.h
3	----------------------------------------------------------------------
4	*
5	* All portions of code are copyright by their respective author/s.
6	* Copyright (c) 2012 Marc Lehmann <schmorp@schmorp.de>
7	* Copyright (c) 2012 Emanuele Giaquinta <e.giaquinta@glauco.it>
8	*
9	* This program is free software; you can redistribute it and/or modify
10	* it under the terms of the GNU General Public License as published by
11	* the Free Software Foundation; either version 3 of the License, or
12	* (at your option) any later version.
13	*
14	* This program is distributed in the hope that it will be useful,
15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17	* GNU General Public License for more details.
18	*
19	* You should have received a copy of the GNU General Public License
20	* along with this program; if not, write to the Free Software
21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22	---------------------------------------------------------------------/
23
24	#ifndef IMG_H
25	#define IMG_H
26
27	#if HAVE_IMG
28
29	#define float_to_component(d) (int32_t)((d) * 65535.99)
30
31	#include <X11/extensions/Xrender.h>
32
33	struct rxvt_img
34	{
35	typedef double nv;
36
37	// could also hold the Pixmap itself
38	struct pixref
39	{
40	int cnt;
41	int w, h;
42	bool ours; // false if we don't own the pixmap at all
43
44	pixref (int w, int h)
45	: cnt(1), w(w), h(h), ours(true)
46	{
47	}
48	};
49
50	rxvt_display *d;
51	Pixmap pm;
52	pixref *ref; // shared refcnt
53	int x, y, w, h, repeat;
54	XRenderPictFormat *format;
55
56	rxvt_img (rxvt_screen screen, XRenderPictFormat format, int x, int y, int width, int height, int repeat = RepeatNormal);
57	rxvt_img (rxvt_display display, XRenderPictFormat format, int x, int y, int width, int height, int repeat = RepeatNormal);
58	rxvt_img (const rxvt_img &img);
59	void alloc ();
60
61	# if HAVE_PIXBUF
62	static rxvt_img new_from_pixbuf (rxvt_screen s, GdkPixbuf *pb); // from pixbuf
63	static rxvt_img new_from_file (rxvt_screen s, const char *filename); // via pixbuf
64	# endif
65	static rxvt_img new_from_root (rxvt_screen s); // get root pixmap
66
67	~rxvt_img ();
68
69	Pixmap steal ()
70	{
71	ref->ours = false;
72	return pm;
73	}
74
75	// inplace
76	void move (int dx, int dy)
77	{
78	x += dx;
79	y += dy;
80	}
81
82	void repeat_mode (int repeat)
83	{
84	this->repeat = repeat;
85	}
86
87	void unshare (); // prepare for write
88	void fill (const rgba &c);
89	void fill (const rgba &c, int x, int y, int w, int h);
90	void add_alpha ();
91	//void linear_gradient (const XLinearGradient gradient, const XFixed stops, const XRenderColor *colors, int nstops);
92	//void radial_gradient (const XRadialGradient gradient, const XFixed stops, const XRenderColor *colors, int nstops);
93	//void conical_gradient (const XConicalGradient gradient, const XFixed stops, const XRenderColor *colors, int nstops);
94
95	void brightness (int32_t r, int32_t g, int32_t b, int32_t a);
96	void contrast (int32_t r, int32_t g, int32_t b, int32_t a);
97
98	void brightness (nv r, nv g, nv b, nv a = 1.)
99	{
100	brightness (float_to_component (r),
101	float_to_component (g),
102	float_to_component (b),
103	float_to_component (a));
104	}
105
106	void contrast (nv r, nv g, nv b, nv a = 1.)
107	{
108	contrast (float_to_component (r),
109	float_to_component (g),
110	float_to_component (b),
111	float_to_component (a));
112	}
113
114	void draw (rxvt_img *img, int op = PictOpOver, nv mask = 1.);
115	#if 0
116	void draw (rxvt_img *img, int op = PictOpOver, nv mask = 1.,
117	nv px, nv py, nv qx, nv qy, nv rx, nv ry, nv sx, nv sy);
118	#endif
119
120	// copy
121	rxvt_img *reify (); // make x, y 0, make real width/height
122	rxvt_img *blur (int rh, int rv);
123	rxvt_img *clone ();
124	rxvt_img *sub_rect (int x, int y, int width, int height);
125	rxvt_img *transform (const nv matrix[3][3]);
126	rxvt_img *scale (int new_width, int new_height);
127	rxvt_img *rotate (int cx, int cy, nv phi);
128	rxvt_img convert_format (XRenderPictFormat format, const rgba &bg);
129	rxvt_img *tint (const rgba &c);
130	rxvt_img *shade (nv factor, rgba c = rgba (rgba::MAX_CC, rgba::MAX_CC, rgba::MAX_CC));
131	rxvt_img filter (const char name, int nparams = 0, nv *params = 0);
132	rxvt_img *muladd (nv mul, nv add); // general multiply and add, implemented as the biggest hack ever :/
133
134	// egregious helper category
135	rxvt_img replace (rxvt_img &p)
136	{
137	delete p;
138	p = this;
139	return this;
140	}
141
142	/* these are considered private */
143	void destroy ();
144	rxvt_img *new_empty ();
145	Picture picture ();
146	rxvt_img transform (const nv matrix);
147	};
148
149	#endif
150
151	#endif
152